#include <iostream>
#include <vector>
using namespace std;

int main()
{
    int n; cin >> n;
    vector<unsigned long long> dp(n + 1);
    dp[0] = dp[1] = 1;
    for (int i = 2; i <= n; i++) dp[i] = dp[i - 1] * 2;
    unsigned long long ret = 0;
    cout << dp[n];
    return 0;
}
